Home / 20,680.38-28,538.55-11,248.74

Finding the Fourth Proportional to 20,680.38, 28,538.55 and 11,248.74

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Solution

The fourth proportional to 20,680.38, 28,538.55 and 11,248.74 is: 15,523.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,680.38 : 28,538.55 = 11,248.74 : x
  2. Step 2: Convert to fraction form
    20,680.38/28,538.55 = 11,248.74/x
  3. Step 3: Cross multiply
    20,680.38x = 28,538.55 × 11,248.74
  4. Step 4: Simplify right side
    20,680.38x = 321,022,728.93
  5. Step 5: Solve for x
    x = 321,022,728.93/20,680.38
  6. Step 6: Final answer
    x = 15,523.06

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.